# Dronning Maud Land Coastal Ice Core 470 Year Oxygen Isotope Data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/22451 # Description: NOAA Landing Page # # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/maud/dronning2012d18o.txt # Description: NOAA location of the template # # Original_Source_URL: https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/pages2k-temperature-v2-2017/data-version-2.0.0/Ant-CoastalDML.Thamban.2012.txt # # Description/Documentation lines begin with # # Data lines have no # # # Archive: ice core # # Parameter_Keywords: oxygen isotopes # # Dataset_DOI: # #------------------ # Contribution_Date # Date: 2017-05-19 #------------------ # File_Last_Modified_Date # Date: 2017-05-19 #------------------ # Title # Study_Name: Dronning Maud Land Coastal Ice Core 470 Year Oxygen Isotope Data #------------------ # Investigators # Investigators: Meloth, T.; Naik, S.S.; Laluraj, C.M.; Chaturvedi, A.; Ravindra, R. #------------------ # Description_Notes_and_Keywords # Description: Oxygen isotope (d18O) data from two shallow ice/firn cores collected in coastal Dronning Maud Land, # East Antarctica, for the past 470 years. #------------------ # Publication # Authors: Thamban Meloth, Sushant S. Naik, C.M. Laluraj, Arun Chaturvedi, Rasik Ravindra # Published_Date_or_Year: 2012-05-11 # Published_Title: Antarctic climate variability during the past few centuries based on ice core records from coastal Dronning Maud Land and its implications on the recent warming # Journal_Name: Society of Earth Scientists Series # Volume: 6 # Edition: # Issue: 5 # Pages: 51-66 # Report: # DOI: 10.1007/978-3-642-28845-6_5 # Online_Resource: https://link.springer.com/chapter/10.1007%2F978-3-642-28845-6_5 # Full_Citation: # Abstract: The role of Antarctic climate variables within the global system and its spatial and temporal complexity are still poorly understood due to the limited and very short periods of observational data collected over a few decades. In order to reconstruct the coastal Antarctic variability during the past five centuries with annual to sub-annual resolution, two firn/ice cores (62 and 65 m) from the central Dronning Maud Land region were studied for proxy parameters like stable isotope and dust records. While the IND-25/B5 provided high-resolution records of the past 100 years (1905-2005), the IND-22/B4 core represented the past ~470 years (1530-2002) of climate change. The IND-25/B5 delta18O record revealed a significant relation to the Southern Annular Mode (SAM), except during certain intervals (1918-1927, 1938-1947 & 1989-2005), when linkage to the El Niņo Southern Oscillation (ENSO) was established through the in-phase relation between SAM and ENSO. However, on a decadal scale, a significant relationship between delta18O and SAM is observed that overrides the intermittent the influence of ENSO. Significant shifts in the deuterium excess record were also observed during periods of ENSO interaction. This may imply a change in moisture source during the periods of stronger ENSO teleconnections. The extended records of IND-22/B4 exhibited relatively more negative delta18O values during periods of reduced solar activity like the Dalton and Maunder Minima, suggesting influence of solar activity on Antarctic climate. The estimated surface air temperatures using the delta18O profiles of two ice cores revealed a significant warming by 0.6-1C per century, with greatly enhanced warming during the past few decades (~0.4C per decade). #------------------ # Funding_Agency # Funding_Agency_Name: # Grant: #------------------ # Site_Information # Site_Name: IND-22/B4 # Location: Antarctica # Country: # Northernmost_Latitude: -70.86 # Southernmost_Latitude: -70.86 # Easternmost_Longitude: 11.54 # Westernmost_Longitude: 11.54 # Elevation: 500 m #------------------ # Data_Collection # Collection_Name: IND-22/B4d18O # Earliest_Year: 1533 # Most_Recent_Year: 1994 # Time_Unit: CE # Core_Length: # Notes: Composite d18O from cores IND-22/B4 and IND-25/B5 #------------------ # Chronology_Information # Chronology: # #------------------ # Variables # # Data variables follow that are preceded by "##" in columns one and two. # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components ( 10 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data, additional_information) # ## age_CE age, , , year CE, , , , ,N, ## d18O delta 18O, ice, , per mil SMOW, annual, ice core, composited, isotope ratio mass spectrometry,N, # #------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header) # Missing_Values: # age_CE d18O 1994 -25.0694 1993 -25.2054 1992 -24.6096 1991 -24.0049 1990 -23.4002 1989 -23.2743 1988 -23.6629 1987 -24.0515 1986 -24.4401 1985 -24.6471 1984 -24.8499 1983 -25.0527 1982 -25.1823 1981 -25.2296 1980 -25.277 1979 -25.3243 1978 -25.2935 1977 -25.2599 1976 -25.2262 1975 -25.2507 1974 -25.3437 1973 -25.4366 1972 -25.5296 1971 -25.2801 1970 -25.0137 1969 -24.7473 1968 -24.6479 1967 -24.7549 1966 -24.862 1965 -24.969 1964 -24.3363 1963 -23.6752 1962 -23.5935 1961 -23.7176 1960 -22.9334 1959 -22.5306 1958 -22.4951 1957 -22.4323 1956 -22.3469 1955 -22.7162 1954 -24.043 1953 -25.2328 1952 -25.1488 1951 -25.0647 1950 -25.1356 1949 -25.2291 1948 -25.2483 1947 -25.2272 1946 -25.3832 1945 -25.781 1944 -26.1686 1943 -26.5148 1942 -26.861 1941 -27.0521 1940 -27.2391 1939 -27.2352 1938 -27.1673 1937 -26.8967 1936 -26.4418 1935 -26.0473 1934 -25.794 1933 -25.5407 1932 -25.2874 1931 -28.3689 1930 -28.137 1929 -27.5816 1928 -26.4656 1927 -25.4449 1926 -23.4492 1925 -22.3709 1924 -22.6451 1923 -23.4172 1922 -23.6139 1921 -23.5795 1920 -23.6393 1919 -23.699 1918 -24.1953 1917 -24.6987 1916 -24.5315 1915 -24.1514 1914 -23.7713 1913 -23.6676 1912 -23.6451 1911 -23.6457 1910 -23.7051 1909 -23.934 1908 -24.4037 1907 -24.8734 1906 -24.7131 1905 -24.4772 1904 -23.8508 1903 -23.3327 1902 -23.2881 1901 -23.5544 1900 -24.013 1899 -24.4717 1898 -24.3239 1897 -24.0493 1896 -24.1554 1895 -24.2779 1894 -24.6661 1893 -25.3565 1892 -26.1597 1891 -27.6071 1890 -29.0546 1889 -27.5208 1888 -25.8948 1887 -25.7159 1886 -25.9192 1885 -26.0553 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